License FAQs

Commonly asked questions about Bootstrap's open source license.

Bootstrap is released under the MIT license and is copyright 2019 Twitter. Boiled down to smaller chunks, it can be described with the following conditions.

It requires you to:

• Keep the license and copyright notice included in Bootstrap’s CSS and JavaScript files when you use them in your works

It permits you to:

• Freely download and use Bootstrap, in whole or in part, for personal, private, company internal, or commercial purposes
• Use Bootstrap in packages or distributions that you create
• Modify the source code
• Grant a sublicense to modify and distribute Bootstrap to third parties not included in the license

It forbids you to:

• Hold the authors and license owners liable for damages as Bootstrap is provided without warranty
• Hold the creators or copyright holders of Bootstrap liable
• Redistribute any piece of Bootstrap without proper attribution
• Use any marks owned by Twitter in any way that might state or imply that Twitter endorses your distribution
• Use any marks owned by Twitter in any way that might state or imply that you created the Twitter software in question

It does not require you to:

• Include the source of Bootstrap itself, or of any modifications you may have made to it, in any redistribution you may assemble that includes it
• Submit changes that you make to Bootstrap back to the Bootstrap project (though such feedback is encouraged)

The full Material Design for Bootstrap license is located in the project repository for more information.